Wierd problem with textures turning white
In texture view, you you will see the image from the UV editor, not the image(s) from the texture(s) assigned to the material, as illustrated in the image below.

Open up your texture image in UV editor while you have the UV map open (if that image is already assigned to a texture, you need not load it again, just click the arrows to the left of the word New, and a drop down list with already loaded images will appear).



You can make the same image visible in solid view as well, if you enable Texture Solid in the Shading panel.